Adjustable box for shafts



(No Model.) E. H. BRIDGMAN.

ADJUSTABLE BOX FOR SHAE'TS. No. 401,408. Patented Apr. 16, 1889.

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UNITED STATES PATENT FFICE.

ADJUSTABLE BOX FOR SHAFTS.

SPECIFICATION forming part of Letters Patent No. 401,408, dated April 16,1889. Application filed May 4, 1888. Serial No. 272,773. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD H. BRIDG- MAN, of Pittsfield, in the county of Berkshire and State of Massachusetts, have invented a new and useful Improvement in Adjust-able Boxes for Slitter-Shafts, of which the following is a full, clear, and exact description.

My invention relates to adjustable boxes for slitter-shafts, and has for its object to provide a box or boxes capable of lateral adjustment, in order that when the deklestraps on a paper-making machine are not set correctly the slitters on the shafts running in these boxes may all be moved with the shaft,

forward or back, to properly cut or divide the sheet of paper or trim both edges alike.

A further object of the invention is to provide for a vertical adjustment of one of the boxes.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims. I

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure l is a side elevation of the device. Fig. 2 is a vertical section, and Fig. 3 is a plan view.

The body or box-support 10 consists of a vertical metal plate provided near the top and bottom with dovetail projections 11 and 12 upon the inner face and a slotted projection, 13, upon the rear face, extending outward therefrom at right angles thereto, through which slotted projection or plate the device may be bolted to the frame of the machine.

The frame 14 of the box consists of a vertical plate or bar, 15, which plate or bar is provided with essentially dovetail grooves 16 and 17 in the rear face, adapted to receive the dovetail projections 1.1 and 12 upon the support 10. The said vertical bar 15 is curved outward at the center between the recesses 16 and 17. From the bottom of the bar 15 an upwardly-curved arm, 18, is projected,

which arm is cast integral with a lower box, 19. In the upper end of the bar 15 a vertical dovetail slot, 20, is produced, and at the base of said slot a horizontal outwardly-extending lug or projection, 21, is formed, as best shown in Figs. 1 and 2.

The frame 22 of the upper box, 23, is provided upon the rear side with a vertical dovetail projection, 24, which projection is purposed to travel in the dovetail groove 20. The upper box, 23, is rendered adjustable through the medium of a set-screw, 25,Which set-screw is vertically held to turn in the frame 22, the lower end of the said screw being pivoted in the projection or lug 21, as best shown in Fig. 2.

In order to give a lateral movement to both the boxes, and thereby move the shafts (not shown) and their attached slitting devices laterally, as described, ears 26 are bolted or cast integral with the box-support 10. A lug, 27, is cast integral with the bar 15 at the center of the concavity therein, and a set-screw, 28, is passed through the ears and through the said lug 27, as best shown in Fig. 2;

Thus by manipulating the set-screw 28 the lower box-frame, which also carries the upper box, may be moved laterally, as desired, and by manipulating the upper set-screw, 25, the upper box may be vertically adjusted, the lower box remaining stationary.

In making water-mark papers it is necessary that the paper should be cut to a certain place, and by turning the set-screw 28 all the slitters or cutting-knives are moved at one time, saving the labor and trouble and time required to change each slitter onboth shafts, as is now the case, also saving paper that would go to waste.

In making plain paper the rough dekle edges of the sides of the sheet have to be trimmed off, and it often occurs that this shaving is all on one side,when, by adjusting said set-screw 28, the same being centrally turned, the shaving can be divided. to leave smooth trimmed edges on both sides. This cannot be done now by the rigid and stationary boxes, and is accomplished only by changing all the slitters on the shaft or changing the dekleshafts, requiring a loss of paper While it is being effected. It is also important that the slitters should be adjustable vertically, and

those on the papershaft be made to pass by those on the lower shaft, sometimes more sometimes less, and when the shafts are to be taken out the slitters can be disengaged. This ad ustment will prevent the two sharp edges from nicking or dulling each other. Sometimes the babbitt will wear more in one box than in another; but by this improvement the adjusting-screw can be operated so as to have the cutting-edges of the slitters or knivesuniform and adjustable to the best point for cutting or trimming the paper smooth and not leave a broken or ragged edge.

Having thus described my invention, what I claim as new, and desire to'secure by Letters Patent, is-

1. The combination, with the support 10, of the movable frame, upper and lower shaftboxes carried by said frame, and screws for vertically adjusting the upper box and for adjusting both boxes laterally, as shown and described.

2. The combination, with the support 10, of the frame which is laterally adjustable thereon, a screw for adjusting the said frame, and boxes attached to the latter for carrying slitner-shafts, as shown and described, whereby the latter may be adjusted with the boxes, as specified. 1

3. The combination, with the support 10, having dovetail projections upon its face, of a frame carrying an upper and lower box, said frame being provided with dovetailed recesses adapted to receive the proj eotions of the bracket, and a screw, substantially as shown and described, for adjusting such box-frame, as and for the purpose specified.

4. The combination, with a body-bracket provided with essentially dovetail projections upon one face and horizontally-projecting ears between said projections, of a frame carrying a lower and upper box, provided with a central horizontal lug, and a set-screw passing through said ears and the frame-lug, substantially as shown and described.

5; The combination, with a body-bracket provided with essentially dovetail projections upon one face and horizontal aligning ears extending outward between said projections, a frame carrying a box at its lower end, provided upon the inner face with horizontal dovetail recesses, a vertical dovetail recess in the upper end, and alug between said recesses, and a set-screw passing through the ears of the bracket and the lug of the frame, of a second box-carrying frame provided upon the inner face with a dovetail projection adapted to enter the upper dovetail recess of the lower box-frame, and means, substantially as shown and described, for vertically adjusting the upper box in the said lowerbox-frame, as and for the purpose specified.

EDWARD H. BRIDGMAN.

Witnesses:

NATHANIEL MORRIS, FRANK B. ROBINSON. 

